ii. Write down the function of sphincter muscle

Dear Student

There are about 50 different types of sphincter muscles found in different locations such as eyes, anus, stomach, etc in human body. Sphincter muscles are found around an orifice or opening  or bodily passage in human body that helps to contract or expand that orifice or opening in response to a particular physiological response. One of the most important sphincter muscle found in lower part of stomach called pyloric sphincter muscle.

diagram of pyloric sphincter muscle



Sphincter muscles present in human digestive system are oesophageal sphincter muscles at lower and upper end of oesophagus, pylorus sphincter muscle, ileocecal sphincter muscle, sphincter of Oddi.
Oesophageal sphincter muscles- mediate the closing of oesophagus when food is not present, do not allow the passed food material to move backward, do not allow the content of stomach to move to the oesophagus.
Pylorus sphincter muscle- do not allow the food material to enter into stomach from deudenum.
Ileocecal sphincter muscle- do not allow the colonic content to move back into the ileum.
Sphincter of Oddi- control the secretions from liver, pancreas and gall bladder.

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